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Finding the Fourth Proportional to 443,383.60, 664,686.60 and 265,961.20

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Solution

The fourth proportional to 443,383.60, 664,686.60 and 265,961.20 is: 398,708.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,383.60 : 664,686.60 = 265,961.20 : x
  2. Step 2: Convert to fraction form
    443,383.60/664,686.60 = 265,961.20/x
  3. Step 3: Cross multiply
    443,383.60x = 664,686.60 × 265,961.20
  4. Step 4: Simplify right side
    443,383.60x = 176,780,845,759.92
  5. Step 5: Solve for x
    x = 176,780,845,759.92/443,383.60
  6. Step 6: Final answer
    x = 398,708.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.